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3 Metabolic Benefits Of Eating Whey Protein Powder Daily 

Molly Knudsen, M.S., RDN
Author:
January 05, 2024
Molly Knudsen, M.S., RDN
Registered Dietitian Nutritionist
By Molly Knudsen, M.S., RDN
Registered Dietitian Nutritionist
Molly Knudsen, M.S., RDN is a Registered Dietician Nutritionist with a bachelor’s degree in nutrition from Texas Christian University and a master’s in nutrition interventions, communication, and behavior change from Tufts University. She lives in Newport Beach, California, and enjoys connecting people to the food they eat and how it influences health and wellbeing.
Image by Arx0nt / iStock
January 05, 2024

Only 12% of U.S. adults are considered metabolically healthy. So most of us have some room for improvement when it comes to blood sugar, lipids, and blood pressure. And one (very easy) thing you can do to sway your health for the better is to eat more protein—specifically whey protein powder. 

Whey is one of the most studied supplements out there, and a sweeping new analysis of decades' worth of research gives us the most comprehensive look yet at whey's role in influencing our metabolic health

About the study 

This study is so comprehensive because it's an umbrella systematic review of randomized controlled trials. Interpretation: It's a detailed report that summarizes findings from a bunch of other reports of individual studies.

A scoping analysis like this lets us take a step back to get the full picture of everything we currently know about whey and metabolic health

So after combing through the findings of 13 reviews representing 109 individual studies (looking at whey intake vs. a placebo, carb supplement, typical diet, etc.), researchers found whey protein to have the most profound effects on these three measures of metabolic health, although the caveat is that these benefits were most notable for those with overweight or obesity: 

1.

Whey helps blood sugar control 

Eating whey protein was consistently found to improve blood glucose (or sugar) levels—including fasting blood sugar, blood sugar after a meal, insulin, and hemoglobin A1c levels (a long-term indicator of blood sugar control).

How does it do that? Like all proteins, whey is composed of a slew of amino acids—including the branched-chain leucine, isoleucine, and valine. These branched-chain amino acids, especially leucine, are known to have a strong positive effect on insulin. (Whey protein is a solid source of leucine compared to plant-based alternatives like soy or pea1.)

Insulin is the hormone responsible for lowering blood sugar when it's elevated (say after a carb-containing meal). You want your body to efficiently trigger the production and release of insulin when this happens, and whey helps that process along. 

Whey also slows down the movement of food through the stomach. This not only helps you feel full, but it also improves blood sugar control.

2.

It helps lower triglycerides

Overall, there was convincing evidence showing that whey protein can improve triglyceride levels. Triglycerides are a type of fat found in the blood. Some levels of triglycerides are normal (because fat provides us with energy). But eating sugar-heavy foods or taking in more energy than you burn can cause triglyceride levels to be high, which is concerning for both heart health and liver health2.

How does it do that? Whey protein improves how the body manages fats—whether it's breaking them down for energy or regulating fat storage. And certain compounds in whey limit how much fat and cholesterol the body absorbs during digestion while pulling in extra fat to the intestines to rid it from your system the next time you go No. 2

3.

It lowers high blood pressure

Just two of the reviews included in this analysis specifically looked at blood pressure, but results were promising on whey's role in lowering already high levels. 

How does it do that? Whey can help relieve blood pressure by blocking a substance that constricts blood vessels and encouraging another substance (nitric oxide) to help widen blood vessels.

The takeaway

Adding whey protein to your daily menu is such a convenient (and tasty) way to help you reach your daily protein goals (which are higher than you might think) and improve your metabolic health. And let's not forget that being metabolically healthy reduces your risk for chronic conditions like Type 2 diabetes and heart disease.

This review didn't specifically mention the ideal amount of whey protein you need to eat a day for these benefits, but 25 grams is a good place to start. (Here's our favorite whey protein powder to get you there). And head to this article to figure out how much total protein you should be getting each day.

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